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docs: make it clearer that rust_version is enforced during compile #15303

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merged 2 commits into from
Mar 17, 2025
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docs: make it clearer that rust_version is enforced during compile #15303

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docs: make it clearer that rust_version is enforced during compile
ericswpark Mar 12, 2025
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Update with suggestion from @epage
ericswpark Mar 17, 2025
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9 changes: 5 additions & 4 deletions src/doc/src/reference/rust-version.md
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Expand Up @@ -19,10 +19,11 @@ identifiers such as -nightly will be ignored while checking the Rust version.

**Diagnostics:**

When your package is compiled on an unsupported toolchain,
Cargo will provide clearer diagnostics about the insufficient toolchain version rather than reporting invalid syntax or missing functionality in the standard library.
This affects all [Cargo targets](cargo-targets.md) in the package, including binaries, examples, test suites,
benchmarks, etc.
When your package is compiled on an unsupported toolchain, Cargo will report that as an error to the user. This makes the support expectations clear and avoids reporting a less direct diagnostic like invalid syntax or missing functionality
in the standard library. This affects all [Cargo targets](cargo-targets.md) in the
package, including binaries, examples, test suites, benchmarks, etc.
A user can opt-in to an unsupported build of a package with the `--ignore-rust-version` flag.


**Development aid:**

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